#!/usr/bin/env python3
# -*- coding: utf-8 -*-

""" a test module """

__author__ = 'Michael Liao'

import sys
import  private_test

def tt():
    args = sys.argv
    if len(args)==1:
        print('Hello, world!')
    elif len(args)==2:
        print('Hello, %s!' % args[1])
    else:
        print('Too many arguments!')

if __name__=='__main__':
    tt()
    print(private_test._private_1("litao"))